Insulating-conduit for electric wires or conductors.



` LP. HINSKY. INSULATING .GONDUIT POE ELEGTRIG WIRES OEON'DUGTOBS.

APPLIUATIQNHLBD rsa1. 1910.

` www W, www W W.; /L MW 9 i To all whom; it mofycoaceragf p o Beitknown that I. A N'rioir P. l-linsiik, a. citizen ofthe UnitedStates, andresiding` at Brookln, in theicounty ofl'ings and State of' i ew York,have invented certain new and useful '11n roveinents in Insulat-`ingC0nduts for` ltlectric `Wires or Con-` ductors, of which the`ollowing; is a, speci-` fication, such-as will.' enable those skilledin the art to which' it appertains to inake and use thel saine.

This invention relates to conduits for` electric `wires or conductorsand the object thereof is to provide an nu'iroved device of this classthrough which electric wires or conductors iiiay `be passedin the usualinanneif anduvhich will thoroughly cover or protect. said wires orconductors; a, further object being' to provide a conduit `of the class`specili'etl which tubular 1nV forni and,`

which passes a high degree of flexibility,

and whlch is also suiooth andeveii onits` inner side so as to facilitatethe passage of electric wires therethrough.

The invention is fully `disclosed in the 'following specification,o't'cvhch the accom panying dra wing` forins a part,iin which theseparate parts ofiny improvement are des? ignated by suitableV referenceclniracterslin each ot` the views and in which2- Figurel .is a`perspective v1e\v showingr in v in'iproved electric conduit and showing"u V the niethod of its construction; 141g'. 2 a

plan and cud view of a strip of fibrous inaterial which l employ' in theconstruction of iny improved electric conduit; rFig. 3 an end view ofatube formed troni the fibrous strip shown in Fig'. 2, said tube beingalso shown in Fig. l; Fig; fl a partial section on the line Ll-fl ofFig. 2; Fig. 5 a perspective view of a iiictal strip or strips which, inpractice, are wound Von the fibrous 'tube shown iii Figs. 2 and 3, saidstrip or strips and the inethod of their windingou the .fibrous tubebeingalso shown in Fig; l, and Fig. (i a. view similar to Fig. 1` b utshowing a` modification.

, ln the practice of my invention I provide a strip cot tibrous`material, said strip be-` ing composed ot'papei.' pulp or similarinaterial.` or said strip may be composed of pasteboard or a thickheavypaper, and said `strip may be-of aiiyidesred length, andthe i'airrnoirr 1?: einsamer nnooiitifiv; nnwfrczaa. 1"Instinafrinelconnorirony-sinonimo `,Wiens oa coiinUcToRs;

' i accom- Specification of Letterslatentl l Patented ilfr: `$9., 1910..Vapplication. rilea If'elnriuanryV 1,1310", Serial No. 541,222. i

v tudinally a tube of a1-1y desired transverse I diniei'isioiis.` u'lliestrip ainay bet'roin a sixteenth of an inch to an eighth ot' aninch inthickness according to the size of thetube be `.torn'ied therefrom, andin practice the `oi'iter side of said strip, or tlieside`ivlich `fouine,the outer side of the tubeyis corru-V `gated` transversely as shown atzgto form corresponding transverse grooves i3 the object of `which is,to render the `coii'ipleted tube or conduit Hcxihleand elastic.

The transverse corrugations a2 do not, in ,the torin ot 'constructionshown, extend entirely across thefstrip o but terminate adjacent' to'the opposite side edgesthereof so as to' torni narrow` strips a* whichare not :cormigrated transversely, and when the strip a foldedlongitudinally to t'orin thetube I) tleedge portions a4 `which are notcorrugated transversely `form `a longitudinal Y groove bf" inthe outersurface of said tube,Y at the point where thesi-de edges thereof arebrought together, and in this` groove is placed a: narrow stripcofrubber or fibrous material saturated with an insulating andpreservative compound, and the tube Z) is also treated in asimilarmanner, and ,the `coniplete tubewhen so formed is thus rende'ied`iml'iervions to water or other liquid substances and is niade water andair tight. The material employed for saturating the tube o or the stripso and c, when the latter lis coiiipossed ot'itbrous material, so as torender the saine impervious to moisture or liquids and; at the sainetime to give said conduit or tube the requisite insulatin qualities niayconsist of any 'of the liquid conipositioris `now useclfor thispurprrse` and the application iand use ofwhich are well known. 4 i

After thc tube o has been formed and ref pared iu the manner described lp ace thereon, in the nia/nner shown in Fig. 1, a' flexible and elasticcasing or covering al composed, in the :torni of construction shown, of:two narrow strips d2 of metal placed together as shown in Fig. 5 and4Wound `on the tube o in spiral form, this` operation being performed bymeans of suitable machinery or by handildesired. The metal strips d2 arebent or curved lon gitudnally so Vas to form, in cross section, a curvewhich is substantially similar to an oiayee curve and in practice two ofsaid strips;Y are placed together so that the edge of one"` overlaps theedge of theother and a narrow strip e of rubber, or fibrous material,treated with an insulating and preservative compound is placed betweenthe overlapping edges of said stri-ps and when the said strips are woundon the tube b in the manner shown and described they form a eXiblemetallic casing for said. tube, and together with said tube form aflexible conduit for the purpose specified, the casing d of which iswater and air tight.

Although I prefer vto place two of the strips d2 together in forming thecasing d of the tube b as shown and described it will be apparent that asingle metal strip Z2 may be employed for this purpose as shown in F ig.(i of the drawing, said strip being curved in transverse section` andthe edges thereof overlapped and' interlocked when helically wound onthe tube.v b in such manner as to render said conduit freely flexible atall points.

In the form of construction shown theclaim, without departing from thespirit of my invention di' sacrificing its advantages.

Having fully described my invention what l claim as new,and desire tosecure by Letters Patent, is g A flexible tubular conduit for electricwires or conductors'composed of an inner fibrous tube formed by foldinga strip 0f fibrous material so that the side edges thereoi abut, saidstrip of fibrous material being edges, the said side edges where theyabut being overlapped by a narrow strip of tibrousinaterlal' whichcloses and seals the space between said edges, the said tube of fibrousmaterial being inclosed by a helically wyound 'metal strip curved incross section so that one edge of Said strip overlaps the other and afibrous strip placed between tsaid overlapping edges, all of saidfibrous parts being treated so as to render them impervious .to moistureor liquids and so as to render said conduit water-tight.

In testimony that I claim the foregoing as my invention I have signed myname in presence of the subscribing witnesses this 29th day of January1910.

ANTHONY PJHINsKY.

corrugated at an angle to its opposite side

